Liquid-heating furnace



F. E. WELLMAN.

LIQUID HEATING FURNACE.l

APPLlATloN EILED APR. 9.. 1918.

1,335,774, Patented Apr. 6, 1920.

` tort tubes and heatingmeans therefor, op-

Y front wall UNITED s'rArr'EsA I PATENT oEEIoE.

. FRANK E. WELLMAN, OF KANSAS CITY,'KANSAS, ASSIGNORTO THE 'KANSAS'CITYGASOLINE COMPANY, OF KANSAS CITY, KANSAS, A CORPORATION F KANS-AAS.

LreUID-HEATING FURNACE.

Specification of Letters Patent.

i l Patented Apr. 6,1920.

Application led April 9, 1918. Serial No. 227,555.

To all whom t may concern Be it known that I, FRANK E. WELLMAN, acitizen of the United States, residing at Kansas City, in the county ofWyandotte and State -of Kansas, have invented certain new and usefulImprovements in Liquidd Heating Furnaces, of which the following is aspecification, reference being had therein to the accompanying drawing.

My invention relates to oil heating furnaces and especially to heatersfor oil refining stills or retorts.

An object of the invention is to provide a heating arrangement in whichthe hot gases are caused to remain in contact with the surfaces to beheated a suiiicient length of time to effect a maximum amount of'absorption of heat from the gases.

Another object is to increasethe length of travel of the hot gases inContact with the surfaces to be heatedwithout undue resistance to theflow of'the hot gases and with a minimum amount of baiiiing walls andsurfaces and a consequent reduction of the amount of heat absorbed inbaffling.

A further object is to provide a combination and arrangement of aplurality of reerable to effect an even distribution of heat to theseveral tubes. Other objects of the invention will be apparent from aperusal of the following specipcation and the accompanying dr-awin sforming a part thereof.

y inventionv is illustrated in the accompanying drawings in which:

Figure l-,is a front elevation with the partly broken away to show theinterior. v

Fig. .2 is a cross sectional view taken on the line 2 2 of Fig. 1.

l the other, the tubes'4 extending In the drawings, 1 .indicatesthe mainheating chamber-near the bottom of which are provided a series ofseparate combustion chambers 2 which extend across the main chamber fromthe front tothe rear thereof and communicate therewith near their rear,ends through Lientz bars 3, -each combustion chamber being provided withsuitable fuel burning means such as the burners 20. The tubular retortelements 4' are arranged within'the mainchamber 1 in two horizontallayers 5 and 6 one above across the chamberfrom side to. side anprojectingl through the side walls 7 and 8 to the outside of the furnacewhere they-are provided with flanged couplings. 9 for connection withother apparatus. The lower layer 6 is spaced from the front wall 10 asshown at' 11 and extend'sback close to the rear wall l2 while theupper'layer 5 iscorrespondingly spaced from thek rear wall as indicatedat 13 and extends to the front of the chamber close to the front wall.vAt the front. of the furnace is provided a series of stacks 14communicating .with the main chamber 1 at the upper forward end thereof,one above each of the combustion chambers 2. The tubes in each layer arearranged close to each other as shown so that while some of the hotgases from the combustion chambers is allowed to circulate between them,the layer as a whole will act as a .hot gases from the combustionchambers are induced to take the path indicated by the arrows in Fig. 2,with a reduced cross flow of gases between the tubes of a layersuiicient to effect an even heating of fthe A.

entire surface'of the tubes. By regulating the relative amount of heatgenerated in the several combustion chambers, any tendency to variationsin temperaturel alon the length of the tubes may be offset an an evenlongitudinal distribution of heat effected. lIt is to be noted here thatinstead of two layers,- one layer of. tubesmay be used, which singlelayer would be positioned as the layer 6 while the flues or stacks 14would be located at the rear Aof the heating chamber to properly directthe draft around the single layer.

While I have herein shown and described a particular embodiment of .myinventlon for the purposel of disclosure, it isto be understood that Ido not limitmyself to such particular embodiment but contemplate allsuch modifications and variations thereof as fairly fall withinthe scopeof the appended claims. .l Y

Having thus described my invention what I claim and desire to secure byLetters, Patent is: .l A

'1. A liquid heater comprising a mainheating chamber, a plurality ofhorizontal layers of parallel tubes one above the other,

Y of combustion.y chambers and individual v combustion chambers, wherebyany tendency heating means therefor arranged below said main chamber andcommunicating theewith through .openings below the lowermost layer oftubes opposite the spaced edge ofsaid lowermost layer, a plurality oflues or stacks communicating with the heating chamber at points abovethe uppermost layer opposite the spaced end of said upper layer, andregulating means for said heating means for regulating the relativeamount of heat generated in the several to variation temperature alongthe length of the tubes may be oi'set and an even longitudinaldistributionfpifli'eat'eiected.

2. A liquid heater comprising a main com- 4 bustionchamber, a pluralityofliquid heating tubes .arranged parallel to each other Aand extendinguninterruptedly across said chamber and through the walls thereof, aplurality'. of combustion chambers situated below'said tubes andextending transversely thereof, and'. means for directing the exit ofheated gases fromthe said heating cham ber, ysaid combustion chamberscommunicating with the heating chamber at one side thereof, said tubesbeing arranged close together to form a baffle' to direct the flow -ofheated gases to the other side.

- In testimony'whereof I ailix my signature.

FRANK E. WELLMAN.

